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GEORGE A. BEIDLER, Oli-CHICAGO, ILLINOIS. Lettera Patent No. 71,268,dated November 26, 1867.

LAMP.

TO ALL WHOM IT MAY CONCERN: l

Beit known that I, GEORGE A. BEIDLER, of Chicago, in the county of Cook,and State of Illinois, have invented a newy and useful Improvement inKerosene Lamps; and I do hereby declare that the following is a full,clear, and exact description thercorcference being had to theaccompanying drawing, and to the letters of reference marked thereon. I

My improvements relates tothat'class of lamps iu which the llame is fedby a. current of air from below, conducted up from the base, .through atube or hollow case, and in which said upward current is l induced byrareiying the air within said hollow case or tube. The accompanyingdrawing represents a vertical section yof a lamp containing myimprovements.

A'is the outer casing of th lamp; B the bottom plate C an annularcil-cup or reservoir; C' a connectingpipe or feeder, for conveying oilfrom the annular oil-cup to the wick-tube, and D is a flat-wick tube,with a bulb or globe, D', at its 'lower end. E is an annular air-chamberor tube, through which the air ascends from the base of the 'lamp tofeed the flame entering through perforations z' z' i. R is the ratchetfor raising and lowering the wick, enclosed' in a semicircular drum, cl,to prevent any oil from escaping through the slots in which theratchet-wheels work, and running down the wick-tube. I is the orificethrough whichthe oil-cup is supplied with oil. G is a glass globe orshade, which may be of the form shown in the drawing, or Ain the form ofan ordinary lamp-globe. H is a dome-detlectcr, made in the usual form.Just above the deilector, and below the glass globe, there is an annularseries of perforations, (two of which are shown at jj,) to admit airwithin the globe for feeding the flame above the deiiector. As aglobe-holder, I prefer to use a detachable metal ring, slipping on to anannular liange rising from the top of the lamp-case, at the base of thedomedeilector, in which case the globe-seat and the perforationsjj willbe in said detachable ring. It will be seen that the usual detachableburner, consisting of a perforatedcup or shell, wick-tube, Snc.,is-wholly dispensed with, and the lamp can be replenished with oilwithout removing anything but the plug from orifice I.l By dispensingwith the usual detachable burner, a' portion of the expense ofconstruction is saved. K is an annular flange or ring, attached at itsupper edge to the case A, and extending down a littlebelow theperforations z' i, to

serve asa breaker,-'and prevent sudden gusts of 'air from affecting thedame; and as a further protection, one

or more perforated platesp maybe interposed at any points between thebase of the lamp and the flame, through which the air must pass beforereaching the flame. Asby the heating of the annular oil-cup, some gasmust be generated therein, provision should be made for the escape ofsuch gas through a very small orifice inthe upper-part of the oil-cup.The wick-tube should be made of copper, or some other metal which is agood conductor of heat. When the lamp is lighted, the heat from theiiame will be rapidly conducted down the wick= tube, rarefying the airin the chamber or tube E, and thus causing an ascending current of airtherein, which is fed to the ame through the dome-deector. At the sametime, if a glass globe be used, as I prefer, the iiame.

will be further fed with air above the dome-deflector, through theperforations introducing it at the bottom of the globe. y 4

I do not claim, broadly, conducting heat from the flame, by means of ametallic conductor, down into a tube or hollow case below to rarcfy theair therein, vand cause an ascending current of air to feed the flame;but what I do claim as lmy invention, and desire to secure by LettersPatent, is-- 1. In-combination with an annular oil-reservoir, and aninner tube or air-chamber for conducting air to the llame frombel0w, ametallic wick-tube, extending down into said air-chamber, and soconstructed and arranged as to operate as a conductor of heat, to rarefythe air in said chamber, and cause an ascending current therein,substantially as described. v

, 2. In combination with a tube or hollow case for conducting air to thellame from below, and a metallic conductor to convey heat down from theflame into said tube or hollow case, andv rarefy the air therein, tocause an ascending current, I claim a glass globe or cup surrounding theflame, with apertures for introducing' air within said globe or cup, andfeeding the flame above the dome-deilector, substantially as described.

3. In combination with a tube or llollowcase for' conducting air to theflame from below, and a metallic conductor to convey heat flown from theiiame into said tube or'lrollow case and rarety the air therein, tocause an ascending current, I claim one or more perforated plates, solocated between the base, where the air enters the tube or chamber, andthe ilame, that the air must pass through said perforated plate orplatos before reaching the dame, substantially as described.A

GEORGE' A. BJJIDLER;y

Witnesses:

J. J. Goonies,l Jos. L. CooMBs.

